Dynamic scaling of viscoelastic elements

摘要

Abstract: The use of scaled models to validate the dynamic characteristics of structures is common. For linear elastic structures, the dynamic characteristics such as natural frequencies can be determined from the scaled models by a scaling factor. This scaling factor is the ratio of the physical dimensions between the scaled model and the structure. However, in the case of viscoelastic elements, the viscoelastic properties of the material are frequency dependent. Hence, in order to use the results of the scaled model, the scaling factor must include the frequency dependent characteristics of the viscoelastic material. In this paper, simple elements are used to illustrate the importance of including the material viscoelastic properties in determining the scaling factor and a procedure is described which can be used to determine the dynamic characteristics of scaled models. !1